Income Taxes - Summary of Reconciliation of Income Tax Expense (Detail) ₨ in Millions, $ in Millions |
12 Months Ended | |||
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Mar. 31, 2026
INR (₨)
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Mar. 31, 2026
USD ($)
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Mar. 31, 2025
INR (₨)
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Mar. 31, 2024
INR (₨)
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| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] | ||||
| Profit before tax | ₨ 173,422 | $ 1,848 | ₨ 174,957 | ₨ 147,210 |
| Enacted income tax rate in India | 34.94% | 34.94% | 34.94% | 34.94% |
| Computed expected tax expense | ₨ 60,594 | ₨ 61,130 | ₨ 51,435 | |
| Income exempt from tax | (13,755) | (12,960) | (14,897) | |
| Basis differences that will reverse during a tax holiday period | 66 | (332) | (202) | |
| Income taxed at higher/ (lower) rates | (7,393) | (7,736) | (7,497) | |
| Taxes related to prior years | (4,141) | (2,306) | 2,567 | |
| Changes in unrecognized deferred tax assets | 123 | (17) | 1,092 | |
| Expenses disallowed for tax purpose | 4,803 | 4,460 | 3,945 | |
| Others, net | 470 | 538 | (354) | |
| Income tax expense | ₨ 40,767 | $ 434 | ₨ 42,777 | ₨ 36,089 |
| Effective income tax rate | 23.51% | 23.51% | 24.45% | 24.52% |
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Effect of tax which are taxed at different rate enacted tax rate in India. No definition available.
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- Definition Tax effect from changes in unrecognized deferred tax assets. No definition available.
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- Definition Tax effect of prior year adjustments. No definition available.
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- Definition Tax effect of tax holiday period. No definition available.
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